Structure and Function Experiment of Pneumatic Ring Brake

In order to solve the problems of robot arm joint posture maintenance and joint damping adjustment, an circular pneumatic brake is designed. The circular gas cell is filled with pressure gas to push the arc-shaped friction plate to extrude the central axis, so as to maintain the position of the rotary joint, and the braking force can be adjusted by adjusting the gas pressure; the theoretical model of brake torque is established, and the correctness of the theoretical model is verified by the relevant experiments of brake force and brake torque. The experimental results show that the greater the air pressure is, the greater the braking force is, when the air pressure is 0–0.28 MPa, the range of braking force is 0–546.08 N; the braking torque of the brake increases linearly with the increase of the air pressure, when the air pressure is 0–0.28 MPa, the adjustment range of the braking torque is 0–3.47 N m.